نتایج جستجو برای: dopamine metabolic
تعداد نتایج: 262507 فیلتر نتایج به سال:
Dopamine is a neuromodulator and neurotransmitter responsible for number of physiological processes. Dysfunctions the dopamine metabolism signalling are associated with neurological psychiatric diseases. Here we report that in primary co-culture neurons astrocytes dopamine-induces calcium signal suppress spontaneous synchronous oscillations (SSCO) neurons. Effect on SSCO was dependent could be ...
Introduction: R-[C]-SKF 82957 is a high-affinity and potent dopamine D1 receptor agonist radioligand, which gives rise to a brainpenetrant lipophilic metabolite. In this study, we demonstrate that systemic administration of catechol-O-methyl transferase (COMT) inhibitors blocks this metabolic pathway, facilitating the use of R-[C]-SKF 82957 to image the high-affinity state of the dopamine D1 re...
Dopamine cell bodies in the substantia nigra of the midbrain and with their terminals projecting to the neostriatum form the nigrostriatum and these dopamine neurons degenerate in Parkinson’s disease (PD). Based on metabolic and functional specialization of the cell bodies versus the axon terminals, the level and disposition of dopamine, its metabolites and enzymes are different in both regions...
Hydrogen peroxide (H(2)O(2)) is emerging as a ubiquitous small-molecule messenger in biology, particularly in the brain, but underlying mechanisms of peroxide signaling remain an open frontier for study. For example, dynamic dopamine transmission in dorsolateral striatum is regulated on a subsecond timescale by glutamate via H(2)O(2) signaling, which activates ATP-sensitive potassium (K(ATP)) c...
Dopamine in urine is derived substantially from renal uptake and decarboxylation of 3,4-dihydroxyphenylalanine (dopa), and increases in excretion of dopa normally parallel increases in excretion of dopamine during salt loading. Since patients with salt-sensitive hypertension may have decreased urinary excretion of dopamine during dietary salt loading, the present study was designed to evaluate ...
BACKGROUND Idiopathic REM sleep behavior disorder is a prodromal stage of Parkinson's disease and dementia with Lewy bodies. Hyposmia, reduced dopamine transporter binding, and expression of the brain metabolic PD-related pattern were each associated with increased risk of conversion to PD. The objective of this study was to study the relationship between the PD-related pattern, dopamine transp...
The Otsuka Long-Evans Tokushima Fatty (OLETF) rat lacking the CCK-1 receptor is hyperphagic, prefers palatable and high-calorie meals, and gradually develops obesity and type 2 diabetes. To determine dopamine levels in this strain, we used in vivo quantitative (no net flux) microdialysis at three different ages representing nondiabetic (8 wk), prediabetic (18 wk), and diabetic (56 wk) stages in...
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